Alois knotz



A. KNOTZ FEED DEVIbE FOR THE PAPER STRIP OF ADDING MACHINES AND CASHREGISTERS Filed Sept. 20, 1929 2 Sheets-Sheet 1 July 14,- 1931.

, A. KNOTZ FEED DEVICE FOR THE PAPER STRIP OF ADDING July 14, 1931.

M HINES AND CASH REGISTERS iled Sept 20 1929 2 Sheets-Sheet 2 device. Y

Patented July 14, 1931 UNITED STATES PATENT OFFICE ALOIS xno'rz, orGRAZ. AUSTRIA FEED DEVICE ,ro'n TiE IE EPAPER srnrr or ADDING MACHINESAnn CASH nners'rnns Application filed September 20, 1929, sr arm.393,875, and in Austria September as, 1928.

- This invention relates to a feed-device for the paper strip of addingmachines and cash registers in particular of such types as have atilting printing roller, and consists essentially in the provision of atoothed rod tiltably mounted on the carrier of the printing roller andadapted to engage in the teeth of a cog wheel mounted on the feed-rollerof the paper strip in one direction on1y,while in the other directionthe teeth slip past each other without engaging. For the purpose ofensuring that the length of strip fed forward at each operation of thedevice be reliably and accurately constant, the end of the addingmachine with multiple printing apparatus is shown in the accompanyingdrawings, in which I Fig. 1 is a side elevation of the adding machine. pFig. 2 is a side elevation of tion of the adding machine in one positionof the printing and feeding apparatus.

Fig. 3 is the same side elevation with the printing and feedingapparatus in' another position. a v Fig. 4 is a section of a portion ofthe feed Fig. 5 is a front elevation of vice. Q I

The adding machine 1 is provided with an operating handl'e2 whichis'situated outside the casing 3 of the cash register and-is connectedto a cog-wheel {which -co-operates with an intermediate wheel 5 and afurther cog-wheel 6. -The carrier 80f a printing roller 9'which on beingtilted'strikes against.

thetype on the wheel 10 is mounted on the fulcrum pin 7 of'thecog-wheelS (Fig. 2).

the back porthe feed decollecting drum 12 is provided on extenslons 11of the carrier 8'for the registering strip 13 whlch is led from a supplyroller (not shown) over the printingroller to the collecting drum.A'lever 14 is mounted on the machine 1 above-the pin 7 in the same planeas a ratchet-wheel 17 attached to the printing roller 9, and drawn by aspring 15 agalnst a stop 16 on the machine. The collecting drum 12 andthe printing roller 9 are connected by an endless band 18. Theconnecting piece 21 of two cheek-plates 22 and 23 bent up at rightangles to the connecting piece is fastened by means of the screws to theback plate 19 of the machine. A feed roller 24'lS mounted in thecheek-plates 22, 23, and a pressure roller 26 is mounted with. a certainamount of play in the arms 27, 28 and guided in the slits which aredisposed ra ially to the feed roller. Above the 'pivot points 29,30 ofthe arms 27, 28

the double-armed levers 33, 34 are mounted at 31, 32 having theirshorter arms resting on the set-screws 35, 36, while the other arms areconnected to the arms 27, 28 to which they are disposed roughly parallelby means of tension springs 37, with the result that the pressure roller26 is pressed against the feed roller 24:. Ashaft 38 mounted in thecheekplates carries at each side a disc 39, 10 in contact with the arms27 28 and provided with pins-41,v 42 which co-operate with the arms. Thedisc is provided with a handle tact with the roller 24.

The axle 4A of the roller 24 carries a ratchet-wheel 4L5 and a cog-wheel16 the teeth of which are similar in formtothose of a ratchet-wh'eel;This cog-wheel cooperates with a toothed rod 18which is mounted on thecarrier 8 at 17 and is provided with teeth corresponding to those of thecog-wheel. The

engagement of the toothed rod in the cogwheel 46 is maintained by alever 51 which is pressed against an extension of the toothed rod 48 bymeans of a spring 49. A double-armed lever 52-, 58 mounted on theoheekplate 22 represents with its one arm a pawl 54 (Figs. 2 and 4) andis provided on its other arm with a plate 55 bent up at right angles andadapted to cooperate with the ratchet wheel 45 or with the toothed rod48. In the position of the carrier 8 shown in Fig. 2 the lever 52, 53rests against the stop 56 in consequence of the weight of the plate 55.A guide 57 for the paper strip intended for the printing of receipttickets is fastened to the machine opposite the point of contact betweenthe rollers 24 and 26. This paper strip 58 comes from a supply roller(not shown), passes between the rollers and through the guiding funnel57, and comes to a guiding device 60 for the ink ribbon 61. The strippasses through a loop formed in the ribbon, and through a slit 62 of theguiding device to a tear-01f comb 63, where it passes out of themachine. A'window 64 permits of the reading of the figures typed on theregistering strip.

The operation of the device is as follows After the amount of the sumtaken has been set by means of the keys the handle 2 is pulled overtowards the front, with the result that the carrier 8 is simultaneouslytilted by means of the wheels 4, 5, and 6 from the position shown inFig. 1 to that shown in Fig. 2, and the printing roller 9' strikesagainst the type on the wheel 10, so that the figures set are printedsimultaneously on the receipt strip 58 and on the registering strip 13.The tilting of the carrier brings the ratchet wheel 17 into contact withthe lever 14 which is tilted about its pivot and by vir tue of thelocation or" its pivot excentrically to the fulcrum-pin 7 of the carrierslips over a number of the teeth of the ratchet-wheel 17. The toothedrod 48 is moved during the tilting of the carrier into the positionshown in Fig. 2, its teeth sliding over those of the cogged wheel 46attached to the feed roller by virtue of the shape of the teeth an-dofthe checking of the feed roller by the pressure roller. The arm 53 ofthe lever 52, 53 hits against the stop 56 and fi-ees the pawl .54 fromthe ratchet wheel 45.

The return movement of the handle 2 tilt-s the carrier 8 back to itsoriginal position. The toothed rod 48 now engages in the teeth of thecog-wheel 46, the feed roller is turned and the printed paper strip 58is correspondingly fed forward, after which the portion projectingbeyondthe tear-01f comb 63 may be detached. The end of the toothed rodhits against the turned up plate of the lever 53,.

the ratchet wheel 45. This provides the advantage of ensuring that thepaper strip, which is often printed on the reverse side with advertisingmatter, be always fed forward to exactly the same extent, so that thelines of detachment exactly coincide with the spaces between the printedmatter on the re verse side of the strip.

The lever 14 also takes part in the return movement of the carrier 8 andsince it is kept in contact with the ratchet wheel 17 by the spring 15it forces this wheel round through a certain portion of a turn, byvirtue of the above-mentioned particular loca tion of its pivot. Thisrotation is transmitted by the band 18 to the collecting drum 12 whichdraws the paper strip 13 forward to a corresponding extent.

The insertion of the paper strip 58 can be facilitated by bringing thepressure roller (Fig. 3) out of contact with the feed roller, which iseffected by tilting the handle 43.

The pressure of the roller '26 against the feed roller can be adjustedby means of the set-screws 35, 36, and the feed-length of the paperstrip by altering the size of the wheel 46 or of the feed roller 24.

I claim:

1. A feed device for the paper strip of adding machines and cashregisters comprising a tlltable holder for the printing roller, atoothed rod tiltably mounted on the said tiltable holder, a drivingroller for the strip, a cog-wheel attached to the said driving roller,the teeth of the toothed Pod being adapted to engage in the teeth of thesaid cog-wheel in one direction only and to slip past them when movedinthe othu' direction, and a double-armed lever, the one arm of whichbeing adapted to oo-operate with the. end of the said toothed rod whenthe holder is tilted back to its original position, the other arm of thesaid double-armed lever being adapted to engage in a ratchet wheelattached to the said driving roller. 1

2. A feed device for the paper strip of adding machines and cashregisters comprising a' tiltahle holder for the printing roller, atoothed rod tiltably mounted on the said tiltable holder, a drivingroller for the strip, a cog-wheel attached to the said driving roller,the teeth of the toothed rod being adapted to engage in the teeth of thesaid cog-wheel in one direction only and to slip past them when moved inthe other direction, a pressure roller, and spiral springs for pressingthe said pressure roller against the driving roller, the said springsbeing connected to the one arm of double-armed levers the other arms ofwhich being in cont-act with set-screws for adjusting the tension of thesaid spiral springs.

3. A feed device for the paper strip of adding machines and cashregisters oomprising a tiltable holder for the printing roller, atoothed rod tiltably mounted on the said tiltable holder, a drivingroller for the strip, a cog-Wheel attached to the said driving roller,the teeth of the toothed rod being adapted to engage in the teeth of thesaid cog-Wheel in one direction only and to slip past them When moved inthe other direction, a pressure roller, spiral springs for pressing thesaid pressure roller against the driving roller, and adjustable meansfor holding one end of the spring,

In testimony whereof I afiix my signature.

ALOIS KNOTZ.

